학술논문
$B\rho$-defined isochronous mass spectrometry: a new approach for high-precision mass measurements of short-lived nuclei
Document Type
Working Paper
Author
Wang, M.; Zhang, M.; Zhou, X.; Zhang, Y. H.; Litvinov, Yu. A.; Xu, H. S.; Chen, R. J.; Deng, H. Y.; Fu, C. Y.; Ge, W. W.; Li, H. F.; Liao, T.; Litvinov, S. A.; Shuai, P.; Shi, J. Y.; Si, M.; Sidhu, R. S.; Song, Y. N.; Sun, M. Z.; Suzuki, S.; Wang, Q.; Xing, Y. M.; Xu, X.; Yamaguchi, T.; Yan, X. L.; Yang, J. C.; Yuan, Y. J.; Zeng, Q.; Zhou, X. H.
Source
Physical Review C 106, L051301 (2022)
Subject
Language
Abstract
A novel technique for broadband high-precision mass measurements of short-lived exotic nuclides is reported. It is based on the isochronous mass spectrometry (IMS) and realizes simultaneous determinations of revolution time and velocity of short-lived stored ions at the cooler storage ring CSRe in Lanzhou. The new technique, named as the $B\rho$-defined IMS or $B\rho$-IMS, boosts the efficiency, sensitivity, and accuracy of mass measurements, and is applied here to measure masses of neutron-deficient $fp$-shell nuclides. In a single accelerator setting, masses of $^{46}$Cr, $^{50}$Fe and $^{54}$Ni are determined with relative uncertainties of (5~-~6)$\times10^{-8}$, thereby improving the input data for testing the unitarity of the Cabibbo-Kobayashi-Maskawa quark mixing matrix. This is the technique of choice for future high-precision measurements of the most rarely produced shortest-lived nuclides.
Comment: 8 pages, 4 figures
Comment: 8 pages, 4 figures